TCS34725: Clear Sensor and Lux

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brevitest
 
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TCS34725: Clear Sensor and Lux

Post by brevitest »

Can the clear sensor reading be used as a measure of lux (if IR is not a big problem)? Why, or why not?

Thanks.

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Re: TCS34725: Clear Sensor and Lux

Post by adafruit_support_bill »

The CalculateLux function in the library is based on weithted readings from the red, blue and green sensors.
https://github.com/adafruit/Adafruit_TCS34725

Lux is a measure of light intensity as perceived by the human eye, and as such needs to take ito account the spectral distribution of the light.

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Re: TCS34725: Clear Sensor and Lux

Post by brevitest »

Thanks for the quick response!
It certainly helps... since I am working on a project where measuring the absolute 'amount' of light being emitted is what counts, not how our eyes perceive it, I guess the clear sensor reading may actually be a better option than lux.

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Re: TCS34725: Clear Sensor and Lux

Post by brevitest »

A related question (or not): can we increase the integration time beyond 700ms to increase the amount of light capture?

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Re: TCS34725: Clear Sensor and Lux

Post by adafruit_support_bill »

No. That is the max supported by the chip.

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